Biology, asked by Kalaiselvi8643, 1 month ago

Air sacs are found in:

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Answered by KumarRajeevRanjan
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Air sacs are found as tiny sacs off the larger breathing tubes (tracheae) of insects, as extensions of the lungs in birds, and as end organs in the lungs of certain other vertebrates. They serve to increase respiratory efficiency by providing a large surface area for gas exchange. See also pulmonary alveolus.

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